The only Ramsar site wetland in Assam is the:

The correct answer is option 1. Key Points The only Ramsar site wetland in Assam is Deepor Beel. Deepor Beel is a freshwater lake located southwest of Guwahati (Kamrup district, Assam). It was designated as a Ramsar site in 2002. Known for rich biodiversity and as a habitat for migratory birds. Additional Information Deepor Beel is important for local livelihood (fishing, water source) but faces threats from urbanisation, waste dumping, and encroachment. Other famous wetlands in Assam: Chandubi Beel, Bordoibam Beelmukh, Samaguri Beel, Urpad Beel – but they are not Ramsar sites yet. Dibru-Saikhowa is a National Park & Biosphere Reserve, not a Ramsar site.